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Synthesis of methanol and isobutanol by CO hydrogenation over Pd-modified K/MnOx-ZrO2 catalysts
He, DP; Ding, YJ
关键词Palladium Manganese Oxide Zirconia Carbon Monoxide Hydrogenation Methanol Isobutanol
刊名CHINESE JOURNAL OF CATALYSIS
2005-11-01
26期:11页:961-964
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
研究领域[WOS]Chemistry ; Engineering
关键词[WOS]PROMOTER ; RHODIUM
英文摘要The influence of Pd on the catalytic performance of K/MnOx-ZrO2 catalyst for synthesis of methanol and isobutanol from syngas (CO + H-2) was studied. Pd shows excellent promoting effects on K/MnOx-ZrO2 and remarkably improves the activity of K/MnOx-ZrO2. Under the reaction conditions of SV = 10000 h(-1), P = 8.0 MPa and T = 673 K, the space time yield of alcohols increased greatly from 122.8 to 232.6 g/(kg (.) h) when 1.5 % Pd (Pd(NO3)(2) as precursor) was added into the K/MnOx-ZrO2 catalyst, and the selectivity for isobutanol increased from 15.5% to 21.7%. However, the catalytic activity and selectivity for isobutanol greatly decreased when the Pd loading exceeded 1.5 %. The results of H-2 and CO chemisorption, FT-IR and TPR indicated that the addition of Pd promoted the reduction of MnOx in the K/MnOx-ZrO2 catalyst and the formation of oxygen vacancy, which might play a role in isobutanol formation. Moreover, the addition of Pd changed the adsorption behavior of K/MnOx-ZrO2. The H-2 and CO uptakes on the Pd-modified K/MnOx-ZrO2 catalyst surface were higher than those on K/MnOx-ZrO2. The higher H-2 and CO uptakes would be in favor of enhancement in the synthesis rate of methanol and isobutanol. The uptakes of H-2 and CO decreased with Pd loading in excess of 1.5 %, so that the space time yield to methanol and isobutanol decreased.
语种英语
WOS记录号WOS:000233880100008
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/139713
专题中国科学院大连化学物理研究所
作者单位1.China W Normal Univ, Coll Chem & Chem Engn, Sichuan 637002, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
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He, DP,Ding, YJ. Synthesis of methanol and isobutanol by CO hydrogenation over Pd-modified K/MnOx-ZrO2 catalysts[J]. CHINESE JOURNAL OF CATALYSIS,2005,26(11):961-964.
APA He, DP,&Ding, YJ.(2005).Synthesis of methanol and isobutanol by CO hydrogenation over Pd-modified K/MnOx-ZrO2 catalysts.CHINESE JOURNAL OF CATALYSIS,26(11),961-964.
MLA He, DP,et al."Synthesis of methanol and isobutanol by CO hydrogenation over Pd-modified K/MnOx-ZrO2 catalysts".CHINESE JOURNAL OF CATALYSIS 26.11(2005):961-964.
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